Radio apparatus



Aug 31 1926 1,598,415

D. F. ASBURY RADIO APPARATUS Filed D90. 2. 1925 I gnueutoz g, B. 224dujcy,

Patented Aug. 31, 1926.

UNITED STATES DOBSEY I. ASBURY, OF BROOMES ISLAND, MARYLAND.

RADIO APPARATUS.

Application filed December 2, 1925. Serial No. 72,840.

My invention relates to radio apparatus,

particularly to receiving sets employing plural tuning units havingmeans associated therewith for operating them collectively andindividually, as and for the purposes set forth in my copendingapplications 683,- 756; 687,080; 689,338 and 690,795, my presentpurpose, generally speaking, being to provide an improved form of commonoperator for a plurality of tuning units, embodying primarily thecharacteristics of simplicity, 'cheap'ness, ease of installation andremoval, and efiiciency in operation.

With the foregoing and other purposes in view, my invention consists inthe novel features of construction, combination and arrangement ofpartsas willcbe hereinafter more fully described, illustrated in theaccompanying drawings and defined in the appended claims.

In the drawings, wherein like characters of reference denotecorresponding parts in the different views Fig. 1 is afront elevation ofthe plural tuning unit radio receiving set showing my invention embodiedtherein; and

Fig. 2, an enlarged section on the line 2-2 of Fig. 1.

The'receiving set shown is of conventional form and embodies threetuning units which are duplicates of one another, each consisting asshown in Fig. 2, of a variable plate condenser 10' including a stator aand a rotor b.

The condensers 10, only one of which is shown in detail to avoidunnecessary'repetition, are suitably mounted to one sideof a panel 12,and their rotors b are aflixed, respectively, to their shafts 14, 16 and18 which extend through openings in said panel and have aflixed thereto,respectively, at the opposite side of said panel, operating dials orwheels 20, 22 and 24. A

Each dial or wheel 20, 22 and 24 carries a short, rotatable shaft 26 andeach shaft carries an eccentric 28, while loosely mounted on each rotorshaft 14, 16 and 18, for rotation with respect thereto, is a disk 30,each disk having a slot 32 therein within which the eccentrics 28respectively operate, whereby, (see application 683,756) when anyparticular disk 30 is held against rotationand the eccentric associatedwith that disk is rotated, the dial or wheel carrying such eccentricis.- rotated, causin rotation of the associated condenser rotor On theother hand, due to the interlock provided between each dial 'and itsassociated disk 30 by the eccentric device associated with each relateddial and disk, rotation of any disk 30 imparts corresponding rotation to(the dial, shaft and rotor b of the condenser associated with that disk.A knob 34 on each eccentric shaft 26 rovides a convenient means ofrotating said eccentrics.

' As shown in Fig. 1 the tuning units are mounted in staggeredrelation'with respect to one another, specifically in a triangularrelation, and so spaced apart that an inherently resilient rod 36engaged with the ually, due to the resistance of the two re-' mainingtuning units through rod 36 to 7o edges of disks 26 between the latterin the manner shown in Fig. 1 contacts with said when any given rotationof the disk 30 assoclated with the rotor b to be individually rotated,since each eccentric 28 reacts from its associated disk 30, when thelatter is held against .rotation,to rotate its associated dial 20, 22 or24 as the case may be.

Preferably rod 36 is of circular crosssection and operates in V-sha edgrooves formed in the peripheries of dis s 30, whereby it is retained inoperative-relation to said disks and is supported in its entirety by thelatter, but, of course, said rod may be of any other cross sectionalshape and may be retained against accidentaldisengagement from theperipheries of disks 30 in any other desired manner. Furthermore, if itisnot desired to provide means for rotating rotors b individually, disks30 and eccentrics 28 may be, eliminated and rod 36 may be engageddirectly with the edges of dials 20, 22 and 24 in which arrangement itwill function exactly the same as in the arrangement shown to impartrotation to rotors b collectively, and if desired rotors Z may be indi-'vidually adjusted simply by springing rod 36 out ol contact with thedial or disk as the Case may be of the unit to be individually adjusted,or out of contact with the dials or disks of all llllil tXtt'Pl the oneto be individually adjusted.

In the event rod 3t; is intended for collectively operating two insteadof three or more tuning units, an idler wheel without connection with atuning unit may be substituted in lieu of any one ot' the disks lit), orin lieu of any dial it), 22 or it, should the latter be used withoutdisks :30 as aforementioned, in which event said wheel wouldprovide aVernier device l'or operating rod 36.

In connection with rod :36 it will be observed that, due to its inherentresiliency and to the arrangement whereby it is maintained under abending moment in driving contact with the movable parts it is intendedto operate, it reacts from said movable parts to maintain its contacttherewith. Said rod may be normally straight or normally curved as theconditions of its use may demand.

I claim:

1. In radio apparatus, a plurality of tuning units a part of each ofwhich is movable, a member adapted for contact under a bending momentwith a plurality of said movable parts tor driving them collectively,and means for maintaining a bending moment in said member to hold it indriving contact with said movable parts.

2. In radio apparatus, a plurality of tuning units a part of each ofwhich is movable, and a member in contact with said movable parts fordriving them collectively, said member being inherently resilient andreacting from said movable parts to maintain its driving contacttherewith.

3. In radio apparatus, a plurality of tuning units a part of each ofwhich is movable, a member adapted for contact under a bending momentwith a plurality of said movable parts for driving them collectively,and means for maintaining a bending moment in said member to hold it indriving, contact with said movable parts, said member being supported inits entirety by said movable parts.

In testimony whereof I hereunto atlix my signature.

DORSEY I ASBURY.

